radioactivity 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: SharlaCreated on: 25-05-18 17:26 radioactive decay unstable nucleus gives out radiation and becomes more stable 1 of 7 count rate counts per second in becquerels, measured by a geiger muller tube 2 of 7 half life time taken for the count rate to fall by half 3 of 7 ionising radiation that has enough energy to knock off electrons from atoms. turns an atom into an ion. 4 of 7 alpha particle 2 protons. 2 neutrons. mass of 4. charge of 2. weak penetrating power. high ionising radiation. travels through air. attracted to a negative charge. 5 of 7 beta particle 1 electron. no mass. +1 charge. medium ionising radiation. medium penetrating power. travels through paper. attracted to positive charge. 6 of 7 gamma ray pure wave of radioactivity. no mass. no charge. weakly ionising radiation. highly penetrating power. only very thick lead can block it. 7 of 7
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